Quartz Outer Tube for D-Torch. Compatible with Thermo 6000/7000 Radial Series ICP-OES D-Torch (30-808-2877). The D-Torch, provides a robust and high-performing alternative to both single-piece and semi-demountable quartz torches, ensuring greater robustness and a lower cost of ownership. With the D-Torch design, the analyst most often replaces only the outer tube, rather than replacing the entire torch or a quartz torch body.When not in use, clean as per recommended guidelines, and store in original box.If analyzing high salt, fusions, wear metals in oil, hydrofluoric acid (HF) or volatile organics, we recommend the ceramic outer tube P/N 31-808-3836, which does not devitrify or crack from thermal shock, like quartz. Compared to quartz outer tubes, the ceramic alternative has an extended lifespan, significantly reducing maintenance, cleaning, and downtime caused by torch failure.Glass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001